Gog and Magog appear as evil figures in the mythology of several different cultures. In the book of Revelation in the Bible, Gog and Magog are the evil powers that will battle God at the end of the world. In Islamic mythology, they appear as forces called Yajuj and Majuj that are fighting against Allah (God).
Britain's Gog and Magog were the last survivors of a race of evil giants. After slaying the other giants, the legendary hero Brut brought Gog and Magog back to London to serve as his gatekeepers. According to tradition, Brut, or Brutus, was the founder of London. London's Guildhall has housed monumental figures of Gog and Magog for nearly 500 years.